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by booli 4106 days ago
Continuous is kind of a misleading marketing term isn't it? If it projected, it is in frames. Just like that the upward movement is in frames / steps. In essence the resolution is still as high as the resolution of the step motors moving the build plate up and it's layer by layer.

Not arguing that it is not a cool technique, just saying that they marketing it again with bogus wording.

I've seen many FDM printers do continuous, albeit vase-like, prints. Shall we market them as Continuous Filament Fuser?
1 comments
no_gravity 4106 days ago
Projectors and motors are analog devices. Even step motors do not move from one position to the other instantly.

In theory you could tell the build plate to go up 100 microns and tell the projector to change the image while taking into account what happens between the two stages. While the motor moves and the lights change color. So you can create different kinds of continuous transitions between the stages.

This applies to every discussion about digital/analog of course.

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booli 4106 days ago
The image the projector makes is in theory also in frames of course.

But yeah, discussion, is a movie continuous or is it frames p/s?

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ddingus 4106 days ago
A "movie" depends on the tech presenting it. For typical projectors, yes. It's discrete frames.

Other displays could vary! A display capable of incrementally updating the picture could show motion as a series of changes without there actually being a frame, just deltas... Done quickly, this would approximate what the human eye does.

In the context of this process, "frame" would refer to the changes to the projected image. Each of those changes would be a "frame"

But, if the object being rendered is actually in motion during the cure, there will be interpolation between those "frames", resulting in a very analog like product.

The motion would be "frames" too, as each micro-step would presumably be a controlled atomic thing, but those movements would not necessarily need to be keyed to the changes in the projected image.

Take both of those up in terms of rates and precision, and it's all going to blend together, particularly as both push the material to it's change rate limits.

Think "motion blur" when motion exceeds capture rates, or in the case of analog film, where reality "smears" onto the film while a shutter is open.

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